A multi-tier approach to identifying environmental stress in altricial nestling birds

1. Birds respond to unpredictable events in the environment by releasing corticosterone, which triggers alternate responses to overcome stressful situations. However, it has been questioned whether altricial nestlings perceive and respond to ecological stressors. Although some studies show adrenal r...

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Detalhes bibliográficos
Autores: Blas, Julio, Baos, Raquel, Marchant, Tracy A., Bortolotti, Gary R., Hiraldo, Fernando
Formato: artículo
Fecha de publicación:2005
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/37005
Acesso em linha:http://hdl.handle.net/10261/37005
Access Level:acceso abierto
Palavra-chave:Ciconia ciconia
Corticosterone
ecological stress
habitat quality
parental quality
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spelling A multi-tier approach to identifying environmental stress in altricial nestling birdsBlas, JulioBaos, RaquelMarchant, Tracy A.Bortolotti, Gary R.Hiraldo, FernandoCiconia ciconiaCorticosteroneecological stresshabitat qualityparental quality1. Birds respond to unpredictable events in the environment by releasing corticosterone, which triggers alternate responses to overcome stressful situations. However, it has been questioned whether altricial nestlings perceive and respond to ecological stressors. Although some studies show adrenal responsiveness in non-precocial species, others report a hyporesponsive period postulated to avoid deleterious effects of corticosterone. 2. To test whether the environmental surroundings of nestlings modulate their stress levels we used a multi-tier comparative approach of plasma corticosterone: (1) within an individual, (2) among nestlings within a brood hierarchy, (3) among broods within a colony and (4) among individuals from different colonies. 3. Nestlings reacted to our protocol by elevating their corticosterone. Baseline levels differed between colonies, and were higher in singleton nestlings compared with two- and three-chick broods, but there were no differences related to within-brood hierarchies, age or condition index. 4. Acute levels were higher in older birds, suggesting a developmental change in adrenal responsiveness. Body condition also explained acute levels but only in singleton nestlings, with higher concentrations in heavier birds. 5. Overall our results indicate that altricial nestlings do respond to a variety of environ- mental stressors, and variation in aspects of environmental quality (e.g. food supply, parental care) may be associated with the differences in stressPeer reviewedBlackwell Publishing201120112005info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/37005reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://onlinelibrary.wiley.com/doi/10.1111/j.1365-2435.2005.00976.x/pdfinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/370052026-05-22T06:33:51Z
dc.title.none.fl_str_mv A multi-tier approach to identifying environmental stress in altricial nestling birds
title A multi-tier approach to identifying environmental stress in altricial nestling birds
spellingShingle A multi-tier approach to identifying environmental stress in altricial nestling birds
Blas, Julio
Ciconia ciconia
Corticosterone
ecological stress
habitat quality
parental quality
title_short A multi-tier approach to identifying environmental stress in altricial nestling birds
title_full A multi-tier approach to identifying environmental stress in altricial nestling birds
title_fullStr A multi-tier approach to identifying environmental stress in altricial nestling birds
title_full_unstemmed A multi-tier approach to identifying environmental stress in altricial nestling birds
title_sort A multi-tier approach to identifying environmental stress in altricial nestling birds
dc.creator.none.fl_str_mv Blas, Julio
Baos, Raquel
Marchant, Tracy A.
Bortolotti, Gary R.
Hiraldo, Fernando
author Blas, Julio
author_facet Blas, Julio
Baos, Raquel
Marchant, Tracy A.
Bortolotti, Gary R.
Hiraldo, Fernando
author_role author
author2 Baos, Raquel
Marchant, Tracy A.
Bortolotti, Gary R.
Hiraldo, Fernando
author2_role author
author
author
author
dc.subject.none.fl_str_mv Ciconia ciconia
Corticosterone
ecological stress
habitat quality
parental quality
topic Ciconia ciconia
Corticosterone
ecological stress
habitat quality
parental quality
description 1. Birds respond to unpredictable events in the environment by releasing corticosterone, which triggers alternate responses to overcome stressful situations. However, it has been questioned whether altricial nestlings perceive and respond to ecological stressors. Although some studies show adrenal responsiveness in non-precocial species, others report a hyporesponsive period postulated to avoid deleterious effects of corticosterone. 2. To test whether the environmental surroundings of nestlings modulate their stress levels we used a multi-tier comparative approach of plasma corticosterone: (1) within an individual, (2) among nestlings within a brood hierarchy, (3) among broods within a colony and (4) among individuals from different colonies. 3. Nestlings reacted to our protocol by elevating their corticosterone. Baseline levels differed between colonies, and were higher in singleton nestlings compared with two- and three-chick broods, but there were no differences related to within-brood hierarchies, age or condition index. 4. Acute levels were higher in older birds, suggesting a developmental change in adrenal responsiveness. Body condition also explained acute levels but only in singleton nestlings, with higher concentrations in heavier birds. 5. Overall our results indicate that altricial nestlings do respond to a variety of environ- mental stressors, and variation in aspects of environmental quality (e.g. food supply, parental care) may be associated with the differences in stress
publishDate 2005
dc.date.none.fl_str_mv 2005
2011
2011
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/37005
url http://hdl.handle.net/10261/37005
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2435.2005.00976.x/pdf
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Blackwell Publishing
publisher.none.fl_str_mv Blackwell Publishing
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.198674

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